ABSTRACT
Lithium-ion batteries have attracted increasing attention because of their promising applications for the next generation of energy storage devices and hybrid/electric vehicles. The ionic compounds from suppliers were dissolved in water, and the same molar amount of LiTFSI was added. The ionic conductivity of an electrolyte plays an important role in the performance of batteries, including the charge/discharge capacity and extent of polarization. Higher ionic conductivity would result in less polarization of ions at a given current and hence smaller potential reduction at the cathode during discharge, consequently giving a longer discharge time and capacity. The ionic liquid (IL)-based gel polymer electrolytes with a small amount of carbonate additive are prepared via the solvent casting method and evaluated for use in lithium metal polymer batteries. Scanning electron microscopy analysis is performed on the morphology of the as-prepared films, which are washed with ethanol to remove IL, carbonate, and salt, followed by drying at elevated temperature.
